MAINTAINERS: update Microchip AT91 sound entries with documentation files

Add documentation files to Microchip AT91 sound entries.
Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Acked-by: Nicolas Ferre <nicolas.ferre@microchip.com>
Link: https://lore.kernel.org/r/20230301113807.24036-9-claudiu.beznea@microchip.comSigned-off-by: Mark Brown <broonie@kernel.org>

MAINTAINERS

@@ -13596,6 +13596,10 @@ MICROCHIP AUDIO ASOC DRIVERS
 M:	Claudiu Beznea <claudiu.beznea@microchip.com>
 L:	alsa-devel@alsa-project.org (moderated for non-subscribers)
 S:	Supported
+F:	Documentation/devicetree/bindings/sound/atmel*
+F:	Documentation/devicetree/bindings/sound/axentia,tse850-pcm5142.txt
+F:	Documentation/devicetree/bindings/sound/microchip,sama7g5-*
+F:	Documentation/devicetree/bindings/sound/mikroe,mikroe-proto.txt
 F:	sound/soc/atmel
 
 MICROCHIP CSI2DC DRIVER
@@ -13771,6 +13775,7 @@ MICROCHIP SSC DRIVER
 M:	Claudiu Beznea <claudiu.beznea@microchip.com>
 L:	linux-arm-kernel@lists.infradead.org (moderated for non-subscribers)
 S:	Supported
+F:	Documentation/devicetree/bindings/misc/atmel-ssc.txt
 F:	drivers/misc/atmel-ssc.c
 F:	include/linux/atmel-ssc.h